| Effects of conservation tillage on soil physical properties and corn yield in sandy soil |
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| DOI：10.7606/j.issn.1000-7601.2016.03.17 |
| Key Words: conservation tillage soil physical property cron yield Horqin sandy land |
| Author Name | Affiliation | | ZHANG Hua-ying | Agricultural College, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China | | LIU Jing-hui | Agricultural College, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China | | ZHAO Bao-ping | Agricultural College, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China | | WANG Li-wen | Agricultural Technology Promotion Center, Tongliao Kezuohouqi, Inner Mongolia 028100, China | | HAO Hong | Agricultural Technology Promotion Center, Tongliao Kezuohouqi, Inner Mongolia 028100, China | | LI Min | Agricultural College, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China |
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| Abstract: |
| There was high frequency of serious windy soil erosion in the aeolian sandy soil area of Horqin. The soil water loss and the soil aggregate content went decreased severely. The objective of this field experiment was to compare the effects of four conservation tillage measurements (subsoiling, stubble, straw-mulching, and no-till) with the conventional tillage (CK) on soil physical properties and corn yield in the aeolian sandy soil region of southeast Horqin from 2013 to 2014. A completely randomized design was used to study the field location. The results showed that compared with the conventional tillage, among the four conservation tillage measurements, the subsoiling and stubble treatments reduced the soil bulk density significantly in the 0～40 cm layer in two years by 0.72%～7.12%. The highest proportion of >0.25 mm soil aggregate content in different soil layers was subsoiling. The soil aggregate content (>0.25 mm) in 0～40 cm layer became increased by 4.11% in 2014 from 2013. Straw-mulching had a greater impact on the soil aggregate content (>0.25 mm) in 0～10 cm layer, increased by 5.54 more in 2014 than 2013. Soil water storage in the 0～100 cm layer was increased by 12.22%～26.91% under the four conservation tillage in the order of stubble＞straw-mulching＞subsoiling＞no-till. Corn yield and water use efficiency of different conservation tillage were higher than conventional tillage (CK). Subsoiling was the best treatment of all. The corn yield was increased by 14.57%, the water use efficiency became increased by 25.81% compared to the conventional tillage treatment. The two-year data indicated that subsoiling, stubble, straw-mulching could improve the aeolian sandy topsoil structure, water retention and crop yield. |
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